CVE-2026-3809 Tenda FH1202 NatSaticSetting fromNatStaticSetting stack-based overflow
A remote attacker can trigger a stack-based buffer overflow in the Tenda FH1202 router via the NatStaticSetting interface, potentially leading to code execution or denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-3809?
CVE-2026-3809 is a high-severity memory corruption vulnerability in Tenda Fh1202 Firmware, published on 9 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A flaw has been found in Tenda FH1202 1.2.0.14(408). The impacted element is the function fromNatStaticSetting of the file /goform/NatSaticSetting. Executing a manipulation of the argument page can lead to stack-based buffer overflow. The attack may be launched remotely. The exploit has been published and may be used.
Which versions are affected by CVE-2026-3809?
It affects 1 product.
Products include Tenda Fh1202 Firmware.
How do I fix CVE-2026-3809?
No fix has been published for CVE-2026-3809 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-3809 being exploited?
There is no known exploitation of CVE-2026-3809 in the wild and no public exploit code.
Other vulnerabilities in Tenda Fh1202 Firmware
Sources
Also known as GHSA-pcvx-47vr-9mpx.